Trump also threatened in a tweet that his supporters would go to Sanders events if the Democratic hopeful wasn’t “careful.”

Sanders said on Saturday his supporters are not to blame for violence that broke out at a planned Trump rally in Chicago.

“I don’t think our supporters are inciting. What our supporters are doing is responding to a candidate who has, in fact, in many ways, encouraged violence,” Sanders said at a press conference, according to CNN. “When he talks about … ‘I wish we were in the old days when you could punch somebody in the head.’ What do you think that says to his supporters?”